(near-infrared spectrograph on the Hale Telescope)
TripleSpec is a near-infrared spectrograph
covering 0.095-2.46 μm, with a spectral resolution
of 2500-to-2700. More than one has been built: one is installed on
the Hale Telescope and another at the ARC 3.5m telescope
at the Apache Point Observatory (APO).
Cerro Tololo Inter-American Observatory's TripleSpec 4.1 (aka ARCoIRIS) is a follow-on.
I believe it is called "TripleSpec" because after
a grating spreads the infrared light by wavelength,
it is passed through three prisms to disperse it
in the crosswise direction.
TEDI (for TripleSpec Exoplanet Discovery Instrument or
TripleSpec Externally Dispersed Interferometry) was an
experiment consisting of incorporation of
an Externally Dispersed Interferometer (EDI), using
interferometry techniques to detect the slight differences
in the spectrum necessary to carry out the radial velocity method.
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Referenced by pages:
Víctor M. Blanco Telescope
cross dispersion spectrograph